I have the same combo except a D7000, not a D7100, but I can't imagine there's much difference in the optimal settings. After a long time of trial and error, I now use exactly the same settings as Kris in CT in his post in this thread, and find it gives me the most keepers. For examples see the most recent pages in my various galleries under http://richard-s.smugmug.com/Birds/Birds-of-Nova-Scotia.